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What Exactly is Semi-Dedicated Hosting?

I noticed the other day that we'd been receiving announcements of hosts launching "semi-dedicated" hosting services over the last little while (let's say two months) with increasing regularity.

This week saw a few at once. It was mentioned, in passing, in the announcement from Frontpages about DoD compliance. And SSA Host launched a semi-dedicated offering. In the latter case, the emerging service distinction lent a little extra spice to an otherwise somewhat less compelling "small web host adds a new hosting package" story.

The point is that the repetition caught my attention, and got me to wondering about just how new and just how significant the emergence of "semi-dedicated hosting" is.

So according to the obvious "Google test," my ignorance might be something to be embarrassed about. My search for "semi-dedicated" hosting turned up about 135,000 entries. A search for "dedicated hosting," by way of comparison, turns up 2,280,000 entries. But still, 135,000 is a lot of mentions for me to have missed.

I should point out here that I wasn't completely clueless. But my information was pretty limited to that which related directly to the few stories we had done.

In the case of this week's SSA Host story, for instance, the company was using the term "semi-dedicated" to refer to a step between VPS hosting and dedicated hosting. Specifically, one that places a limit on the number of virtual servers per physical server, and guarantees access to a certain amount of system resources.

I sent an email to Dan Garon, whose Press Advance service was responsible for at least three of the recent "company adds semi-dedicated hosting" announcements and half-jokingly asked if "semi-dedicated" was purely a semantic distinction.

He said the exact definition depends on the company; that, for example, another one of his clients had a different technology on the back-end of its semi-dedicated offering than that supporting its VPS hosting.

It seems that semi-dedicated, like "managed hosting" or "green" or many of the other distinctions in the hosting business, is pretty nebulous. It means a lot of different things, depending on whom you ask.

I dug through a few old Web Hosting Talk threads, and it seems like the cynical answer is that semi-dedicated is "glorified shared hosting." If there was a semi-dedicated offering before virtualization became a big part of hosting, then it was probably an effort to answer some of the needs addressed by VPS hosting (or some of the shared hosting shortcomings).

It seems like the spread of VPS hosting is changing the meaning of semi-dedicated somewhat. Now that just about everyone offering dedicated hosting has a VPS offering, maybe "semi-dedicated" is evolving into an effort to address some of the shortcomings of VPS hosting.

I'd love to hear some feedback on this one too. Anyone offer a "semi-dedicated" hosting package? What is it that makes it what it is? What kind of customer is it aimed at?

Liam Eagle has worked as a contributor to the Web Host Industry Review since its inception in 2000, and as editor since 2003. He has been editor of the WHIR's print magazine since its launch. His daily involvement in the gathering and reporting of Web hosting news and his regular interaction with We... (Read full bio)

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Comment by Anonymous on Saturday, November 22, 2008

Well, I thought this had something specific to do with the trucking industry. I had just spent a ton of time preparing the next launch of dedicated servers that we were going to call "semi-dedicated servers" aimed at over the road drivers and to my disappointed I come to find out I have missed the target. Thanks to Liam I am back on track, but I would like to first see if I can relate this whole "semi" thing to something before I get too far....

Would facebook/myspace be consider "semi-shared hosting"?

Would webmail be considered "semi-pop3 email"?

Would riding a bus to work be considered "semi-car pooling"?

Would a double quarter pounder with cheese split between friends be considered a "semi-steak dinner"?

Am I getting close? Maybe a few more relational examples could help me nail this. Until then I have some flyers to get ready that we are distributing via truck stops, rest areas, and major highways advertising our Semi-Dedicated Server.

http://www.fastservers.net/ap/semi-dedicated-server.gif (am I off base here?)

Comment by Anonymous on Monday, November 24, 2008

I've always wondered exactly what semi-dedicated hosting was. It always just sounded like a larger reseller account to me, but without the control of a VPS.

Now I know and knowing is half the battle, or so they say ;)

Comment by Anonymous on Thursday, November 27, 2008

To my knowledge semi-dedicated would be closer to cloud hosting, with separate instances of OS's, web servers and databases running on powerful server clusters and storage arrays. Ususally they run off a VM ware platform, and provide provide 'unilimited' on-demand resources such as CPU, Memory, storage and bandwith. In essence, this is a superiour model than dedicated because it utilizes formerly idl resources for those that require them on demand, eliminating the hassle of upgrading and adding servers when dealing with traffic spikes. This is defintely where the future of hosting is, but it will take some time for the market to understand the benefits of this new technology.

Comment by Anonymous on Monday, December 01, 2008

I think one of the things that's clear is that "semi-dedicated hosting," much like "cloud hosting," would be better served if everyone could agree on what it meant. Particularly so that a term that might have some use in describing something worth describing couldn't be co-opted by the more opportunistic and less principled folks and used in a way that dilutes the value of whatever was being distinguished in the first place.

Of course, in the case of semi-dedicated, there's the question of whether there's even something worth distinguishing there, or any consensus on what it might be. I might suggest that if there's something there that deserves its own name, then it probably deserves a better name than "semi-dedicated" hosting, which almost strikes me as confusing on purpose.

Aaron, how did you get the servers in the grill like that? Did you have to take out the engine, or does the truck still run? It seems like it would be perfect for pulling around one of those data centers built inside a shipping container.

Comment by Anonymous on Thursday, December 04, 2008

I must thank you you for letting all of us aware about Semi dedicated hosting, your style of explaining it is exceptional, I loved it. Your efforts deserve great appreciation!

Comment by Anonymous on Wednesday, December 10, 2008

The engine is gone and I actually converted the semi into a solar powered rig. My thoughts are to have both a semi-dedicated server + be green at the same time. With both under my belt this will certainly be marketing power house that cannot be stopped.

No one will ever agree on what the term semi-dedicated servers are as they are not real. It's like calling a slice of pizza a semi-pizza or calling Liam Eagle a semi-fictional author :)

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